Direct Formation of Thin Single Crystals of Organic Semiconductors onto a Substrate

We have developed a novel and convenient method of crystal growth in a liquid phase. This method produces directly onto a substrate well-defined polygon organic thin crystals with uniform thickness. The thin crystals are found to be single crystals of high quality. We show various illustrations including thiophene/phenylene co-oligomers and an oligophenylene. The organic crystal transistors based on these crystals showed good device performance. These thin single crystals are expected to be suitably applied to electronic devices.